Mittlere Änderungsrate = ΔT / Δt [ jeweils in °C/min ]
a) Mittlere Änderungsrate = (13-10) / (30-0) = 3/30 = 1/10 = a
b) Mittlere Änderungsrate = (30-13) / (60-30) = 17/30 = b
c) Mittlere Änderungsrate = (30-10) / (60-0) = 20/60 = 1/3 = c
d) (a+b) / 2 = (3/30 + 17/30) / 2 = (20/30) / 2 = 1/3 = c